hope you dont mind cunstructive criticism from me =)
first, i LOVE the pupil and the iris, you did an amazing job on that part, better than i could do =)
however, there are some problems with the fur, as well as some proportions and shape.
first, the fur. you generally have the right texture and shades and you almost (so close!) have the directions right. the biggest i see is on the left side, the fur doesnt really flow together as it should. as well as the direction under the eye isnt going the right way, it needs to be more angled to the right.
the shape of the entire eye is a little off as well, its a tad too stretched out and it has too much of a diamond shape to it. here is an eye i did, its a dogs eye, this should give you a better reference to the shape. this photo should also give you a good idea of fur, although i kinda gave up and left it a little sketchy...
http://maineac92.deviantart.com/art/Eye-207363562and below is my reference photo for the eye drawing. the image is huge, so you can zoom all the way in (click to zoom once, then click again to view at full size). its the perfect image to see the flow of fur and even the smallest details. hope it helps!
http://maineac92.deviantart.com/#/d3dz3meim still impressed by that iris! amazing color choice as well!